To solve this problem you must apply the proccedure shown below:
1. First, you must multiply $8 by the hours given in the exercise:
[tex](8dollars)(25hours)=200dollars[/tex]
2. Now, multiply the result obtained above by 4, to calculate her monthly income:
[tex](200dollars)(4)=800dollars[/tex]
3. If 22% of her paycheck goes to taxes, you have:
[tex](800dollars)-[(800dollars)(0.22)]=624dollars[/tex]
Therefore, the answer is: $624